Civil Engineering Reference
In-Depth Information
Transverse—horizontal resolved loads in the direction of the
angle bisector.
Longitudinal—horizontal resolved loads 90° to the transverse
loads.
Vertical—loads resolved to be in the same plane as the vertical
axis of the pole, also known as the pole's axial load.
1.1.2.3 Wind effect: Wind on structure shall be given as a unit pres-
sure (in lbs/sf or kips/sf), including overload factors, to enable
the Manufacturer to adjust for varying pole diameters. If gust or
height factors not specifi cally covered by codes are to be applied,
those values will be furnished separately by the Purchaser. The
pole's shape factor will be taken as 1.0 (for a smooth round
surface) unless otherwise stated.
1.1.3 Wire data : In the absence of load trees, the following wire data
must be furnished:
1.1.3.1 Design properties: For conductors, shield wires, underbuild,
cable TV, fi ber optics cables, and communications cables, these
properties will include type, code name (if any), diameter, area,
modulus of elasticity, ultimate breaking strength, design strength,
and other factors.
1.1.3.2 Span data: These include wind and weight spans, ruling
span, maximum and minimum spans, and line angles.
1.1.3.3 Sag-tension data: These include design tensions, maximum
sag, and controlling tension, as well as load cases desired.
1.2 Structural Requirements
Each structure must be furnished with the following data:
1.2.1 Structure details : Data must show hole locations for attachments,
grounding details, step-bolt locations, and other inserts when
required.
1.2.2 Specifi c defl ection limitations : Data must show any required
limitations.
1.2.3 Embedment depth : Data must show the point of fi xity, if other than
the groundline.
1.2.4 Guyed structure data : For structures that require guying, data must
be provided to show the attachment location, orientation to lines,
slope or lead distances from the pole's centerline, type, diameter,
area, breaking strength, and modulus of elasticity of all guy wires.
In addition, any pretensioning data must be included, if required. If
the maximum allowable guy tension is less than those strength
reduction factors given by NESC, the Purchaser will provide those
values.
 
Search WWH ::




Custom Search